Electric vulcanizer.



0.C. DENNIS. ELECTRIC vULCANlzEH.

APPLICATION FILED MAR. 6,19l1.

Patented Apr. 22, 1919.

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oLIvEn c. DENNIS, or WILMETTE, ILLINOIS.

i ELECTRIC VULCANIZER.

Specification of Letters Patent.'

Patented Apr. 22, 1919.

Application led March 6, 1917. Serial No. 152,478.

To all whom it may concern.'

Be it known that I, OLIVER C. DENNIS, a citizen of the United States,and a resident of Wilmette, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in ElectricVulcanizers, of which the following is a full, clear and exactdescription.

The invention relates to portable electric vulcanizers. One object ofthe invention is to provide a vulcanizer of this type which is simple inconstruction and in which the connections between the ilexi'bleconductor cord and the vulcanizer vare effectively protected frombreakage or being short circulted.

A further' object of the invention is to provide a vulcanizer of thistype which is adapted to be applied to the work by an ordinary screwclamp and which is completely disconnectiblel from the clamp.

A further object of the vinvention is to providean improved portableelectric vulcanizer which is simple in construction, eiicient inoperation and can be produced at a low cost.

In the drawings: Figure 1 is a section of a vulcanizer embodying theinvention. Fig. 2 is a section taken on line 2--2 of Fig. 1. Fig. 3 is asection taken on line 3 3.

The improved vulcanizer comprises a cupshaped body having a concavebottom 5, and

a cylindrical outer wall 6, the bottom being.

concave to receive a atch to be ap lied to a tire tube or other ru berarticle. II)`he body is made of sheet metal. An electric heatin orresistance element consisting of' a coil o suitable wire 7 wrappedaround a strip of mica 8 and a disk 9 of mica between the heatingelement and the bottom 5 of the vulcauizer body, are disposed in thebody. Above the heating element is placed a disk 10 of asbestos todirect the heat downwardly toward the bottom 5 and a metallic disk 11 islIlaced on top of the asbestos disk 10. A

ho ow conoidal ca 12 is secured on the top of the disk 11. nsulation 9,heating elenient 7, asbestos 10, disk 11 and the cap plate 12 are .allsecured .and clamped tgether in the bod by an inturned flange 14 on theside 6 of t e body. 'In the manufacture of the vulcanizer after the pa9, 7, 10 and 11 have been placed in the ange 14 is bent inwardly anddownwardly to hold all partsin the body in fixed and clamped relation sothat separate means for securing the parts inthe vulcanizer against y,the

displacement will be. avoided. This manner of constructing the body andcontained parts makes it possible to produce the vulcanizer at a lowcost and prevents breakage of y said parts.

A pair of clamping members or blocks 15 and 16 of insulating materialare secured on the top of disk 11 by screws 17 which ass :member 15. Abushing 21 of insulating maferial is disposed above the hole lin disk 11to prevent electrical contact between the terminals 18 and 19 and themetallic body 11. Conductor wires 22 and 23 ci a conductor cord 24 havetheir terminals'extended between the clamping members 15 and 16 and theterminals 18 and 19 of the heating element are placed in contact withsaid conductors respectively and these terminals are clamped together 1nfirm lcontact when the member 16is clamped against member 15.v

The conductor cord 24 is extended. through an opening 25 in one side ofthe cap 12, and is provided with a suitable plug 26 for the connectionto a socket of any suitable or usual construction and which is adaptedto be connected to a battery. Cord 24 is extended through hole 25 whichis at one side of the cap and thence to the opposite side and connectedto the clam 15, 16, so that the cord will be looped in t e capV toprevent a direct pull on the clamped conductor terminals, ifa pullshould be accidentally eX- erted upon e conductor cord.

In operation, the vulcanizer, in its entirety, may b e placed on top ofa patch and a tire tube or article to which the patch is to bevulcanized and held thereon by an ordinary screw clam 30 shown in dottedlines in Fig. 1, which 1s completely disconnectible from the vulcanizer.If desired, a pocket 27 may be formed in the top of cap 12 to receive a.centering pin or projection 28 on the screw of the clamp toposition thevulcanizer in the clamp. v

The invention exemplies a portable electric' vulcanizer which is simplein construction and can be produced at a low cost. v'Ihe several partsare eiiicientlylsecured against displacement in the body by beingclamped therein without additional clamping means.

The conductor terminals are secured to terminal blocks which areprotected by the cp and short circuit of the terminals is e cientlyprevented. v

The invention is not to be understood as restricted to the details setforth, since these may be modified within the scope of the ap- .pendedclaims, without departing from the spirit and' scope of the invention.

Having thus described the invention, what I claim as new and desire tosecure by Letters Patent, is: I

l. In an electric vulcanizer, the combination of a body, a resistanceelement, insulatipn and a metallic disk, said element, insulation anddisk being disposed in superposed relation `and clamped in the body tosecure the element, insulation and body against relative displacement,an insulatingclamp centrally disposed on said disk to which the terminalof the resistance element is connected, and conductors leading to saidclamp.

2. In an electric vulcanizer,-the combination of a body comprising abottom and a side wall, a resistance element, insulation and a metallicdisk, said element, insulation and disk being disposed in superposedreladisposed on the disk and tion in said body, the side-wall being bentinwardly to clamp the element, insulation and disk in the body to securethem against displacement, and conductors leading lto said resistanceelement.

3, In an electric vulcanizer, the combination of a body comprising abottom and a side wall, a resistance element, insulation and a metallicdisk, a hollow cap, said cap, disk, element and insulation being clampedin said body by said cap, and con- 6. In a portable vulcanizer, thecombina tion of a body, a resistance element, insulation, and a disksecured in said body, a clamp of insulation secured to the top of saiddisk, said disk having a hole therein, an insulating bushing in saidhole, said element having both terminals extended through said bushingand held in said clamp and conductors having terminals held in saidclamp.

7. In a portable vulcanizer, the combination of a body, a resistanceelement, insulation, and a disk secured in said body, a clamp ofinsulation secured to the top of said disk, said disk having a holetherein, one member of the said clamp having a hole therein, aninsulating bushing in said hole, said element having both terminalsextended through said bushing and said hole in the clamp-member and heldin said clamp, and conductors having terminals held in said clamp.

8. In a portable vulcanizer, the combination of a body, a resistanceelement, insulation, and a disk secured in said body, a hollow conoidalca secured to said body, a clamp of insulatlon secured to the said diskand centrally disposed within said cap, and conductors having terminalsheld in said clamp, the terminals from the resistance element being alsoheld in said clamp.

9. In a portable vulcanizer,`the combination of a hollow body, aresistance element, insulation and a disk secured in said body, a hollowcap secured to said body and having a recess formed in the top thereofto receive a clamp screw, a clamp of insulation secured to the diskwithin said cap,

.and conductors having terminals held in said clamp.

' OLIVER C. DENNIS.

